function doiCompare(status) {
	var ar = new Array();
	var rem = true;
	if (document.f && document.f.model) {
		var len = document.f.model.length;			
	} else {
		rem = false;
		//return false; // if no results, do nothing.
	}
	for (var i = 0; i < len; i++) {
		if (document.f.model[i].checked) {
			ar.push(document.f.model[i].value);
		}
	}
	var cmp_list = ar.join(",");
	if (ar.length < 2 || ar.length>3) {
		alert("Please select only 2 or 3 autos to be compared");
		rem = false;
		//return false;
	}
	if (rem == true) window.top.location = "a_product_compare.php?ModelID="+cmp_list+"&Status="+status;
}